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Northern Power aims its 60 kW turbine

... It provides long-term benefits with lower ownership costs over the lifetime of the turbine. A new 24-m rotor features state-of-the-art hub and blade technology with superior aerodynamics providing a larger swept area. This increases the annual energy production (AEP) of the NPS 60-24 by up ...
by DoctorEvil
on Mon Dec 01, 2014 12:59 pm
 
Forum: Rotors and magnets
Topic: Northern Power aims its 60 kW turbine
Replies: 0
Views: 845

Re: Spring loaded varriable pitch hub

... two iron balls attached to arms that pivot at the top and has a lever halve way on the arms that then controls any item that you want in this case blade pitch. Think off using a trailer stub shaft to attach the blade to (3 off) these units = 3 blades. Place an offset flat plate on the outer shaft ...
by blackbee0045
on Tue Nov 04, 2014 4:28 am
 
Forum: Blades and Hub
Topic: Spring loaded varriable pitch hub
Replies: 11
Views: 7387

Re: PVC Blades

The blade calculator (on the main site) might be useful for you to see the attack angle you want at each point along the blade. Then you can work out what % of the circumference of a circle (the size fo the pipe) would approximate ...
by windgat
on Tue Aug 05, 2014 3:38 pm
 
Forum: Blades and Hub
Topic: PVC Blades
Replies: 5
Views: 4042

Re: Blade profile calculation

Thanks, its good to know its useful!
by windgat
on Tue Aug 05, 2014 3:33 pm
 
Forum: Blades and Hub
Topic: Blade profile calculation
Replies: 26
Views: 16600

Re: Blade profile calculation

Thanks windgat for the codes to find blade profile calculation. I was so confused at this topic and had no idea how I can calculate this one. I tried to search in many websites but nothing was enough satisfactory. Your help was indeed very ...
by janemcready
on Fri Apr 04, 2014 1:45 pm
 
Forum: Blades and Hub
Topic: Blade profile calculation
Replies: 26
Views: 16600

Re: Spring loaded varriable pitch hub

... two iron balls attached to arms that pivot at the top and has a lever halve way on the arms that then controls any item that you want in this case blade pitch. Think off using a trailer stub shaft to attach the blade to (3 off) these units = 3 blades. Place an offset flat plate on the outer shaft ...
by chal5oye
on Sat Jan 18, 2014 2:14 pm
 
Forum: Blades and Hub
Topic: Spring loaded varriable pitch hub
Replies: 11
Views: 7387

GOE 222

Hello Forum, My name is Mike Holmes. I came across your site by accident this evening. I live in Ireland and am in the process of building a 6.5 meter turbine . Is it possible to put in the Gottingen GOE 222 Airfoil data on the Blade calculator? Great site , you guys are very busy.Mike
by mikeh935
on Wed Jun 05, 2013 12:00 am
 
Forum: Blades and Hub
Topic: GOE 222
Replies: 1
Views: 1977

Re: Simple Blade Calculator

Hi Innovo. I wrote the PHP code for that page, and it is based on some fairly complex aerodynamic formulas... I still have quite figured out how to apply the Reynold's number... Sure I could try and do something for water, but I guess the base formulas are completely different, due to the fact that ...
by windgat
on Mon Feb 11, 2013 11:32 am
 
Forum: Blades and Hub
Topic: Simple Blade Calculator
Replies: 1
Views: 1303

Simple Blade Calculator

I love the blade calculator, But :) if the person that made that could contact me or make a page for use in water that would be good. I have a water system that I am having problems designing a blade for and would actually like ...
by Innovo
on Fri Feb 08, 2013 5:49 pm
 
Forum: Blades and Hub
Topic: Simple Blade Calculator
Replies: 1
Views: 1303

Re: 12V 24V 48V Stator

... magnet strenght and/or the number of winds. 3. The question does not make sense. Volts per RPM is a sensible measure. Watts per square meter of blade also makes sense. Watts is power, RPM is speed - to confuse the two is common. A huge turbine turning slowly will produce far more watts (i.e. ...
by windgat
on Fri Mar 25, 2011 5:04 pm
 
Forum: Stators and coils
Topic: 12V 24V 48V Stator
Replies: 1
Views: 2342

Re: Weird blades

Each blade is at least 1m long. Perhaps the diameter is about 2.5m. As far as I know, its intended as a new design which is claimed to be more efficient than the more usual thin blade design.
by windgat
on Mon Mar 07, 2011 1:48 pm
 
Forum: Blades and Hub
Topic: Weird blades
Replies: 5
Views: 3865

Re: Weird blades

Must be somekind of high torque blade design. Surely they can't go fast. Looks like it captures the wind somehow, but the blades is not pitched very much. Hmm.. Hard to think it's effecient in any kind of way. :D
by danielxavier
on Fri Feb 18, 2011 9:21 am
 
Forum: Blades and Hub
Topic: Weird blades
Replies: 5
Views: 3865

Re: Size & Shape of Coils

Hi Windgat Still around and working on my wind Gen. Did test on my three blade vawt today and seem pretty good. I have changed my plans some what, I want to first build the mechanical drive systen then adapt the coils that I have built and then buy and fit the ...
by easyas
on Tue Dec 28, 2010 9:41 pm
 
Forum: Stators and coils
Topic: Size & Shape of Coils
Replies: 22
Views: 14535

Re: laws and restrictions

Hi there. I believe the height restriction for a Ham radio mast is 9m, so perhaps best to stick to that, including the blade height. That makes for quite a tall pole - I would be interested to see how you intend to erect it, and what stays you plan on using. The force in a high wind ...
by windgat
on Sun Dec 12, 2010 1:26 pm
 
Forum: By laws and restrictions
Topic: laws and restrictions
Replies: 3
Views: 5537

Re: laws and restrictions

... find a structural engineer to certify a building plan and submit it to the local council in the Parow district where I live. I manafactured my own blades using Modified PVC pipe and am using a 5 blade rotor with 1:3 ratio on my input shaft. On testing I found the noise level to be very low. I initially ...
by maghanee
on Thu Nov 18, 2010 5:43 pm
 
Forum: By laws and restrictions
Topic: laws and restrictions
Replies: 3
Views: 5537

Re: Simply the Motor part

... RPMS. The alterantor also has a voltage regulator which simplifies your wiring. The big problem is again the RPMs. The pulley for the windturbine(blade Side) would need to be about 450mm, and on the alterator about 60mm to produce 2000RPM required on the alternator @ about 267 RPM blade speed. ...
by chadley
on Wed Oct 20, 2010 11:19 am
 
Forum: Stators and coils
Topic: Simply the Motor part
Replies: 3
Views: 2790

Re: Simply the Motor part

... crucial question - start there. You may find a very high RPM is needed - see posts elsewhere on this site re alternators. 2. I don't. There is a blade calculator on the main page however that can be used to calculate the optimal blade config for some aerofoil shapes. If you come somewhere close ...
by windgat
on Tue Oct 12, 2010 10:06 pm
 
Forum: Stators and coils
Topic: Simply the Motor part
Replies: 3
Views: 2790

Re: #22 gauge magnet wire

Try to makethe core of the blade 90 deg to the shaft 90deg.jpeg It is 90 degrees to the shaft I was told to try it at 9 degrees and see how it works. Also the turbine does not try to turn backwards it trys to turn at low wind speed and ...
by charlie_ruizpr
on Sun Oct 03, 2010 5:45 am
 
Forum: Stators and coils
Topic: #22 gauge magnet wire
Replies: 13
Views: 8920

Re: #22 gauge magnet wire

Try to makethe core of the blade 90 deg to the shaft
90deg.jpeg
90deg.jpeg (6.36 KB) Viewed 7900 times
by goof
on Sat Oct 02, 2010 8:55 pm
 
Forum: Stators and coils
Topic: #22 gauge magnet wire
Replies: 13
Views: 8920

Re: How much power does a wind generator produce?

It all depends on the blade size. With 1m blades, 800W should be attainable.
by windgat
on Sun Sep 26, 2010 10:12 pm
 
Forum: General
Topic: How much power does a wind generator produce?
Replies: 85
Views: 50792

Re: Blade drawings

Hi Jk. Have you looked at the blade profile generating system (see on the main web page)? Cooperating to get a 3D model sounds like a great idea!
by windgat
on Sun Sep 26, 2010 10:08 pm
 
Forum: Blades and Hub
Topic: Blade drawings
Replies: 2
Views: 2069

Re: New at this

Vane (or blade) construction is the part I have found the hardest. Perhaps something using sections of PVC pipe? Look around this forum for ideas.

Yes, powerful magnets are needed to get the voltages required.

Yes, the coils legs should be the same length as the magnets.

Hope that helps!
by windgat
on Sun Sep 26, 2010 5:34 pm
 
Forum: Stators and coils
Topic: New at this
Replies: 1
Views: 1647

Re: Blade drawings

http://www.otherpower.com/bladecarving.shtml
feedback on these?
by jkproperties
on Mon Sep 20, 2010 8:51 pm
 
Forum: Blades and Hub
Topic: Blade drawings
Replies: 2
Views: 2069

Blade drawings

Hi All
Does anyone have a blade drawing they are willing to share?
or what Type of blades, shapes work best...
I can create 3d models and will in return share those to make machining or manufacture easier.
by jkproperties
on Mon Sep 20, 2010 8:37 pm
 
Forum: Blades and Hub
Topic: Blade drawings
Replies: 2
Views: 2069

Re: #22 gauge magnet wire

... whit the turbines is that thy don't start by them self thy need help I solved the problem my making variable pitch angels so if the wind hits the blade it will move and it will give lift in the rite angle as you can see there are weight on the blades so that the centrifugal force pulls it back ...
by goof
on Tue Sep 14, 2010 9:10 pm
 
Forum: Stators and coils
Topic: #22 gauge magnet wire
Replies: 13
Views: 8920
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